Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...
Patent
1979-12-26
1981-06-16
Downey, Mary F.
Radiation imagery chemistry: process, composition, or product th
Transfer procedure between image and image layer, image...
Diffusion transfer process, element, or identified image...
430207, 430208, 354303, 354305, G03C 554, G03D 900
Patent
active
042738520
ABSTRACT:
An instant film unit, including first and second superposed sheets, and conventional internal spacers for controlling the depth of a layer of processing fluid distributed by flowing the fluid between the sheets, is provided with additional internal spacers that reduce the resistance to fluid flow and augment the quantity of fluid supplied to the lateral edges of the imaging area. In the disclosure, the first spacers comprise portions of a mask, which frames the imaging area. The additional spacers are side rails which separate the lateral edges of the sheets by an amount greater than the thickness of the mask. The film unit is adapted for use with a processing device which includes a pressure nip long enough to span the imaging area, but the side rails are outside of the pressure nip adjacent the ends thereof.
REFERENCES:
patent: 2467320 (1949-04-01), Land
patent: 2627460 (1953-02-01), Land
patent: 3195434 (1965-07-01), Dietz
patent: 3309201 (1967-03-01), Friedman
patent: 3455691 (1969-07-01), Bachelder
patent: 3647441 (1972-03-01), Bachelder
patent: 3694206 (1972-09-01), Downey
patent: 3764332 (1973-10-01), Harvey
patent: 4042395 (1977-08-01), Tone
patent: 4148652 (1979-04-01), Sylvester
patent: 4196000 (1980-04-01), Johnson
Research Disclosure No. 12267, pub. Jun. 1974.
Lange Gerald A.
Simpson Charles J.
Downey Mary F.
Eastman Kodak Company
Turner John B.
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